So you hear a clunking noise at any speed and makes a banging noise when engaging into drive or reverse? if so you definitely have a tranny issue. check the fluid, it should be nice and red no matter how many miles, if it is dark or has silver specs you have issues. wont last you long like that.

As i said check your tranny fluid and make sure its nice and red and at the proper level. There is really nothing else that can
cause that noise when engaging into drive or reverse. As of the banging noise from movement from side to side or over
humps you might want to check your wheel barings.

I bought a new 2008 Wrangler Unlimited (Yellow) a little over two months ago. It now has 2,302 miles on it and am noticing rust all over the exhaust pipes, muffler, driveshaft, and rear suspension. ...